Book excerpt: This book presents 1,274 entries of species names. It is a compilation of what is currently available in literature, herbarium databases, and from searches for specimens in major European herbaria and in the private collection of Wied in Neuwied, Germany. For each entry, information on the status of species name, authority, the venue of protologue publication, synonyms and/or names annotated on labels, and the specimens located in different herbaria are provided. Up to the present, 2,741 specimens attributed to Wied have been located, distributed in 139 families, 569 genera and 1,197 species of vascular plants, and 23 families, 36 genera and 52 species of cryptogams, including algae. Wied specimens are amongst the earliest extant collections from Brazil, comprising a precious record of the flora of the Atlantic rainforest and of the dry vegetation (semideciduous forest, savanna and caatinga) of Bahia in the early 19th century. Over 500 of them are nomenclatoral types.